| Violation: An instance of non-compliance |
| Serious Reporting Violation: Defined by California Water Code section 13385.1 as a failure to file a discharge monitoring report pursuant to Section 13383 for each period of 30 days following the deadline for submitting the report, if the report is designed to ensure compliance with limitations contained in waste discharge requirements that contain effluent limitations. |
| Serious Effluent Violation: Serious violation as defined by California Water Code section 13385(h). Waste discharge exceeds the effluent limitation for a Group I pollutant by 40% or more (CAT1), or a Group II pollutant by 20% or more (CATs). |
| Chronic Violation: Chronic violation as defined by California Water Code section 13385(i). To be counted as a chronic violation, there must be 3 prededing violations within a 180 day period. The fourth non-serious violation that occurs within the 180 day period is an MMP violation. |
